Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd808400d0788f88…

MALICIOUS

PDF

38.1 KB Created: 2021-05-13 20:48:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b8d2deff1b7b6fa0af0097ca61c0bcc3 SHA-1: 3e92fd71b16f9b3efeb7e4d2d46b493c98f10b97 SHA-256: fd808400d0788f88599bc43079dc38f534548ff3405c584f8b83cdbaed96b92a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. This URL is also flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Coin Master Free Coins' and the malicious URL, reinforcing the lure. The primary attack pattern involves tricking the user into visiting a malicious link that likely leads to a payload download.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-coins-no-human-verification-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000037ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37CE 27036 bytes
SHA-256: baf047e77f42c3440884ac3df6f09f3c20b792d872c60632b128b36f5dd212e2
font_01_sfnt_off000073df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DF 18244 bytes
SHA-256: bf3fe32e7bdb8dff11b484033bf5381a512b4267db5012b87197df855ee77eab

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